This guys have opened a P3P 4K camera, making a good general review:
http://www.toptoyspace.com/2015/05/14/disassembling-the-dji-phantom-3-video-camera/
If curious, that's for you !
http://www.toptoyspace.com/2015/05/14/disassembling-the-dji-phantom-3-video-camera/
If curious, that's for you !